+-----------------+
   /                 /|
  /                 / |
 /                 /  |
+-----------------+   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   |
|                 |   +
|                 |  /
|                 | /
|                 |/
+-----------------+

  +--------+
 /        /|
+--------+ |
|        | |
|        | +
|        |/
+--------+

   +-----------------------------------------------------+
  /                                                     /|
 /                                                     / |
+-----------------------------------------------------+  |
|                                                     |  |
|                                                     |  |
|                                                     |  +
|                                                     | /
|                                                     |/
+-----------------------------------------------------+